Nigger-bar.



I No. "732,815.

PATENTED JULY 7, 1903.

J. H. E. AUGER.

NIGGER BAR.

APPLICATION FILED JUNE 14, 1902.

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UNITED STATES Patented July '7, 1903. I

ATENT FFICE.

JOSEPH II. E. AUGER, OF BRAINERD, MINNESOTA, ASSIGNOR OF ONE-THIRD TO ALBERT S. MATTES, OF BRAINERD, MINNESOTA.

NlGGE R-BAR.

SPECIFICATION formingpart of Letters Patent N 0. 732,815, dated July '7, 1903.

Application filed June 14, 1902.

To all whom it may concern:

Be it'known that I, JOSEPH H. E. AUGER, of Brainerd, Orow \Ving county, Minnesota, have invented certain new anduseful Improvements in Nigger-Bars, of which the fol-. lowing is a specification.

The invention relates to sawmill machinery, and particularly to the mechanism employed for transferring logs from the deck to the carriage.

In steam nigger-bars as usually constructed the side bars are split or forked where they are joined to the butt and are weakened therebyto such an extent that breakages frequently occur, and owing to the number of rivets necessarilyused the repairs are tedious and expensive.

. to secure the side bars to the butt in such a way that a large number of rivets usually employed may be dispensed with and there will be no weak points to give way when the bar is subjected to the usual pounding or jarring strain. 1

Other objects of the invention will appear from thefollowing detailed description.

The invention consists generally in providing a nigger-bar butt with vertical ribs, between which the side bars are secured.

Further, the invention consists in providing keyways in said butt and in the side bars which are adapted to register when the parts are placed together and wherein keys are snugly fitted.

Further,the invention consists in providing improved pivot-pins between the piston-rods and the butt.

Further, theinvention consists in improved means for connecting the lead bar to the butt.

Further, the invention consists in various constructions and combinations,all as hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figurel is a side elevation of a steam nigger-bar embodying my invention. Fig. 2 is a similar view of the butt with the sidebars removed. Fig. 3 is a vertical section through the butt, showing the bars secured thereon." Fig. 4 is a horizontal section on the line 00 x of Fig. 2 look- Serial No. 111,608. (No model.)

ing up. Fig. 5 is a section on the line y y of Fig. 1. V Fig. 6 is a section on the line a z of Fig. 1.

In the drawings, 2 represents a suitable base whereon the engines 3 and 4. are mounted. These engines are provided with the usual pistons with rods 5 and 6, that are connected to the forked ends of the nigger-bar butt 7 by means of the pivot-pins 8. These pins are tapered, as shown, so that they will automatically seat themselves in the pivotholes, and they are held in place by means of plates 9, secured to. the butt by cap-screws 10. The opposite ends of the pins may be provided with spring-cotter pins 11. These pins being tapered will always fit snugly in the holes and will insure a close-fitting connection between the pistons and the niggerbar butt at all times. Ordinarily straight pivot-pins are used, which soon wear or work loose, causing a loose rattling joint that frequently requires attention and repairs.

Upon each side of the butt 7 I provide vertical ribs 12, forming ways wherein the side bars 13 fit snugly and are secured by rivets 14, passing through holes 15 in said butt. These rivets serve to brace and strengthen the bars against lateral movement even when they are subjected to the most severe and pounding strain of the bar, and I have found this manner of securing and supporting these side bars so eifectual that I have been able to dispense with a number of the rivets that heretofore it has been found necessary to employ to secure the side bars firmly to the butt. Instead of providing the butt with the ribs, as described, I may groove the surfaces of the butt to receive the bars; but in that case I should probably prefer to make the butt thicker at that point to avoid any possibility of weakness and danger of breakage.

At the upper end of the butt on each side I prefer to provide a vertical keyway 16, which registers with a similar keyway in the surface of the bar when thebars are placed together, and within each way I provide a key 17, fitting snugly therein and securely'bracing and strengthening the upper end of the butt and bars and relieving-theshear strain on the rivets during the operation of the nigger-bar. These keys preferably lie one half to the butt by a straight pin 24:, fittinga hole 5 with the usual wheel 18 and dogs or teeth 19.

Near the cylinders I provide an upright timber 20, having a slot or socket 21 to receive the end of a lead bar 22, pivoted on a block 23. The opposite end of this bar is forked, as shown in Fig. 5, and is connected 25 in the butt between the side bars and one of the pivot-pins 8. This lead bar holds the nigger-cylinders and the bar firmly and in an upright position and in machines of this kind as usually constructed is connected direct to the pin on which the piston-rod of the other cylinder is attached. This manner of connection causes, of course, an additional strain on the pivot-pin, resulting in greater Wear thereon and more frequent breakage. The pin 24. is preferably held in position by springcotters, and the pin passing through a thicker portion of the butt forms a very substantial connection and onethat is entirelyindependent of the connection with the engine-pistons.

The butt is preferably made of cast-steel and can be of any desired width, according to the tooth to be used. The side bars are so braced and strengthened that there is little probability of breakage and When worn can be readily replaced Without drilling new holes in the butt, which is frequently necessary when a breakage occurs in general use. i

I claim as my invention-- 1. A butt for nigger-bars, provided in its opposite sides with elongated vertical grooves or recesses having parallel sides, side bars fitting snugly Within said grooves, and means passing through said bars and butt and securing them together.

2. A nigger-bar butt provided on its opposite sides with vertical parallelv ribs, bars fitting snugly between said ribs, and rivets passing through holes in said bars and said butt and securing them firmly together.

3. A nigger-bar butt, provided in its opposite sides with vertical keyways, side bars having keyways adapted to register with those in said butt, and keys fitting snugly within said ways and locking said bars against lateral movement.

4.-. A nigger-bar butt, provided with vertical ribs and keyways in its opposite sides, bars fitting snugly between said ribs and having keyways to register with those in said butt, keys fitting snugly within said ways, and rivets passing through said bars and said butt.

In witness whereof I have hereunto set my hand this 10th day of June, 1902.

JOSEPH H. E. AUGER.

In presence of S. F. ALDERMAN, W. H. MANToR.

in the butt now 

